There are many reasons President Trump should not be pushing Congress to pass huge tax cuts, but here’s one you may not have heard: Budget deficits and trade deficits are twins. When the former go up, so, generally, do the latter. So at the same moment Mr. Trump is upending the global economy in a feckless attempt to eliminate America’s trade deficit, he’s essentially pressuring Congress to increase it.
Here’s how it happens. The United States buys a lot of goods from other countries, and we pay for the goods with dollars. But those dollars are no good abroad, so the countries we buy from invest them here. Some of the money goes, directly or indirectly, into businesses that are raising cash to build new data centers or expand natural gas facilities or construct new apartment complexes. Other dollars go into Treasury bonds or bills, which the federal government uses to fund our large budget deficit. (The same thing happens in reverse when other countries buy from the United States — but to a lesser degree, since our imports are larger than our exports.)
If the budget deficit rises, American investors could theoretically cover the shortfall, but that would mean putting their money in Treasury securities rather than businesses and their capital needs. The other option is that foreign countries amass more dollars and plow them back into the U.S. economy. How would they get those additional dollars? From all the German cars and Chinese electronics and imported beer that Americans will buy with the money from their tax cuts.
More generally, a larger budget deficit will require the government to borrow more money, which drives up interest rates. Higher interest rates mean a stronger dollar, which makes it more expensive for people in other countries to buy our products, cheaper for us to buy theirs, and thus the trade deficit widens.
So cutting taxes, as Mr. Trump has told Congress to do, will drive up the budget deficit — and the trade deficit. All of this may seem counterintuitive, but it’s one of the few things that economists agree about.
The budget deficit is already worryingly high and the tax cuts Mr. Trump is seeking would make it even larger. Last year the United States ran a $1.8 trillion budget deficit, or 6 percent of the gross domestic product — higher than at any other time except during World War II, the late-2000s financial crisis and the Covid-19 pandemic — despite strong economic growth and no unusual emergencies.
